SYLVANIA 5814 Triple Mica Black Ribbed Plates with Square Getter
An extremely rare one from early 1950's. Our stock tubes are mostly labeled for Heintz and Kaufman. Some have their labels missing, but all are NOS. Their construction is quite unique with the third mica elevated quite bit higher on the top of the second one. If you're after a classic warm sound with good soundstage, these would be a good choice.

SYLVANIA 6189 Triple Mica Black Ribbed Plates with Square GetterAnother extremely rare one from early 1950's. These have identical construction to the 5814's above. Our stock is very low and labels vary. If you're after a classic warm sound with good soundstage, these would be a good choice.Quantity in Stock : Out of Stock!Price : Grade A @ US$29,00/ea; US$60,00/matched pair Grade B @ US$22,00/ea; US$46,00/matched pair Grade C @ US$14,00/ea; US$30,00/matched pair

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SYLVANIA JHS 12AU7 1950's Black Plates with Square-Getter
These might be as rare as the above. Only 5 pcs in stock. They have black ribbed plates but with center pinch.

SYLVANIA 6189/12AU7WA GOLD BRAND Triple Mica Gray Plates
Cool stuff! Very rare find too. These gems have identical structure to the 5814 TMGP but with more liquidity and insight to the music. The 4 tubes in stock have identical serial numbers : 62-D and excellent test scores! All Grade-A!!

Grade A - The best in the stock. Lowest noise and microphony with the tightest balanced sections we have available. This is typically 10% or often tighter given the large volumes of our stock.

Grade B - Low noise and microphonics with a section balance typically between 15% and 20%, but may be higher depending on available stock.

Grade C - Lowest noise but slightly microphonic. Section balance will be similar to Grade A or B. This grade is only suitable for use in the driver stage of an amplifier, or the output/buffer stage of a DAC or CD Player.

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DEAR VISITOR / CUSTOMER!

- Мы говорим по-русски тоже!- We can provide quote in EURO for the orders from Euro Zone!- All the tubes on sale come straight from the State & Military surplus and are UNUSED VIRGIN NOS unless otherwise noted. - The photos here are NOT samples but ACTUAL PHOTOS of the stock tubes. - We ship WORLDWIDE. Typical shipping cost to all destinations is about US$12-15 for small packages.- Tubes are meticulously TESTED before shipping. We WARRANTY all tubes and shippings. - We do NOT charge PAYPAL fees !